EP3456535B1 - Inspection d'image des produits imprimés avec des classes d'erreur - Google Patents

Inspection d'image des produits imprimés avec des classes d'erreur Download PDF

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Publication number
EP3456535B1
EP3456535B1 EP18181139.9A EP18181139A EP3456535B1 EP 3456535 B1 EP3456535 B1 EP 3456535B1 EP 18181139 A EP18181139 A EP 18181139A EP 3456535 B1 EP3456535 B1 EP 3456535B1
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EP
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Prior art keywords
inspection
printing
image
printed
print
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EP18181139.9A
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German (de)
English (en)
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EP3456535A1 (fr
Inventor
Frank Soltwedel
Sascha Epp
Volker Felzen
Martin Klüpfel
Uwe Peters
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N21/956—Inspecting patterns on the surface of objects
    • G01N21/95607—Inspecting patterns on the surface of objects using a comparative method

Definitions

  • the present invention relates to a method for waste management by means of profiles with the aim of an automated machine reaction on the basis of predefined action profiles in connection with measurement data which are determined via sensors during print production and compared with the action profiles.
  • a special form of this method results in a method for image inspection of printed products, with faulty printed images being processed further by different end devices depending on their fault class.
  • the invention lies in the technical field of automatic quality control.
  • inline means that the inspection system, more precisely the camera of the inspection system, is installed in the machine. It is usually attached after the last printing unit or, if available, a further post-processing station, such as a coating unit, and records the printed products produced by the printing press.
  • the digital print images generated in this way by means of the camera are then compared with corresponding good images of the print subject in an image processing computer. These good images can either be created from the prepress data or they are taught in.
  • teach-in means that a series of print products are printed with the print subject to be generated and captured by the camera of the inspection system.
  • sample prints should be as error-free as possible and are therefore stored as a good image as a digital reference in the image processing computer after they have been recorded by the inspection system.
  • the camera of the inspection system then captures the generated print image or parts of it and compares it with the digitally taught-in reference or the reference image created from the prepress data. If there are deviations between the production runs produced printed products and the digital reference are determined, these deviations are displayed to the printer, which can then decide whether these deviations are acceptable or whether the printed products produced in this way are to be removed as waste.
  • the printed sheets recognized as waste can be ejected via a waste gate.
  • the entire process can also take place in an automated manner, in that the printer sets corresponding threshold values in the form of tolerances, so that error sheets are automatically ejected that exceed these tolerance values.
  • sheets or printed products with deviations from the digital reference are not marked as waste, but are marked by a stripe in the case of a printed sheet with errors, so that this printed sheet is removed from the printer in the delivery and a can be subjected to manual review.
  • the print subject which contains the print images actually to be generated, is placed on the print product as part of the imposition.
  • the advantage over an inspection of the entire printed sheet is that only errors that occur in areas that interest the printer - namely in the print subject - are recorded by the inspection system and communicated to the printer.
  • the printers switch off the inspection mode of the inspection system and switch to a so-called live image, where they can see the entire sheet on a display using a digital camera image. This enables them to recognize whether such errors as smearing on the edges of the print substrate occur and, if necessary, intervene in good time.
  • the disadvantage here is that the automatic inspection mode is interrupted, which correspondingly reduces the performance of the automatic inspection system. In any case, settings must be made on the printing press in order to eliminate these effects, which in fact leads to disadvantageous performance of the inspection system.
  • the marking of printed sheets that are later to be examined manually by the printer using a strip is done by a so-called strip insert.
  • strip inserts as well as the waste diverter, are corresponding end devices for controlling the further processing of the correspondingly generated printed product.
  • the printer can only globally select a link between the printed product generated and a terminal. For example, he can only determine by configuring the inspection system that the sheet is deviating too much so that it has to be ejected via the waste gate. The link then generally applies to all sheets with these identified deviations from the digital reference image. However, this causes a correspondingly high level of waste with unnecessary costs in the event that the printed products produced could perhaps still have been classified as for sale after an assessment by the printer.
  • the printers very often set the inspection parameters of the inspection system to very large tolerance values, but this means that, on the one hand, the inspection system does not work with the accuracy that is actually possible and, on the other hand, the printer receives information over detailed deviations, which are then no longer recorded by the inspection system, are lost.
  • the German patent application DE 10 2011 014073 A1 discloses for this purpose a method for regulating a printing process, whereby by means of a register mark sensor at least one position and / or an extent of a register mark located on a printing material is detected and used for register control, which is characterized in that during the printing process at least one color information is recorded by means of the same register mark sensor with which a color monitoring is carried out, with a color distance to a reference value is determined and a threshold value for the color difference is defined, if it is exceeded a warning is issued and / or an automatic switch from good to bad products is made.
  • the invention thereby creates the possibility of simultaneous regulation and / or measurement of the position (register regulation) and color with a single detection device.
  • the effort and costs for a color and register control can be reduced significantly, since in particular the measurement of the color information is not carried out with expensive camera systems, but with cheaper brand sensors.
  • a printing press with an inline inspection system with a lighting device with at least one light source arranged at a distance from a printing material is known, the at least one light source of the lighting device being cooled by a liquid or a gaseous cooling medium, with a control device for the light source of the lighting device is provided, wherein a light sensor is connected to the control device, the light sensor measuring the amount of light emitted by the at least one light source of the lighting device, the control device adapting a duty cycle of the at least one light source based on the measurement signal of the light sensor.
  • German patent application DE 195 16 354 A1 also discloses a method for image inspection and color guidance on printed products of a printing press. Whereby, preferably in on-line operation, actual image data of the print images of the printed products are determined and compared with target image data for error detection. It is provided. That when an error occurs, before a change in the color guide, a check is carried out to determine whether the cause of the false start is other than the color guide for the deviation.
  • the object of the present invention is therefore to find a method for inspecting images of printed products in a machine that processes printing materials, which method makes it possible to improve the efficiency and accuracy of image inspection compared to the prior art.
  • Waste management sensors in particular in the form of an image capture system with at least one image sensor, capture print images of the printed products and compare them with a digital reference and, in the event of discrepancies between the captured print images and the digital reference, the incorrectly recognized print products are ejected, and which is characterized by that waste profiles are created which contain parameters to which specific actions are assigned and for print images recorded during the image inspection that deviate from the digital reference, the specific actions are carried out depending on the parameters, with different terminals being controlled in each case depending on the specific actions.
  • it In order to print a print job on the printing machine, it must be brought into a state suitable for this print job.
  • waste profiles are created which contain all the necessary information in the form of input parameters to identify faulty print products as waste and to process or separate them accordingly by activating the relevant end devices. Additional information that is generally necessary or useful for waste management can also be part of the waste profile.
  • the waste profiles contain defined error classes as parameters and the specific actions are assigned to these error classes, with the defined error classes in error classes for information about deviations that are still within the tolerances, for warnings about occurring errors and about critical ones Defects that require direct action can be divided.
  • the defined error classes in error classes for information about deviations that are still within the tolerances, for warnings about occurring errors and about critical ones Defects that require direct action can be divided.
  • a further subclass is the warning regarding occurring errors, which indicates to the printer that the tolerance values have already been exceeded here and that an action may be required, but the exceeding of the tolerance values is not yet so serious that an automated ejection as waste of the generated Printed product is necessary.
  • the further subclass with regard to critical errors thus indicates that the inspection system has determined that direct actions are required, usually the marking of the printed product produced as waste and its removal. For a subdivision into such error classes, the inspection system must be parameterized accordingly so that clearly specific deviations can be assigned to specific error classes.
  • the division into the error class for information about deviations that are still within the tolerances results in the display of the information in the inspection user interface as an action, the division into the error class for warning about occurring errors the marking of the faulty print products and the classification into the error class via critical errors the removal of the faulty print products.
  • the preferred development is that the display of the information in the user interface of the inspection by controlling the terminal of a display on which the results of the image inspection are displayed, the marking of the faulty print products by the control of the end device of a strip inserter and the discharge of the faulty printed matter is done by activating the end device of a waste gate.
  • the classification of a printed product with a deviation from the digital difference into the error class for information about deviations that are still within the tolerance leads directly to the control of a terminal in the form of a display to show the information about the deviation present.
  • the printer is informed of the present deviation via this display, for example in the form of the display of the control station of the printing machine.
  • the error class for warning about errors that occur is linked to the end device of the strip inserter, which marks the corresponding faulty printed product, whereby the printer can remove the marked printed product, for example in the form of a faulty printed sheet, from the print delivery and subject it to a manual check to assess whether the error that occurs is really such a serious error that it is necessary to mark the printed product as waste.
  • the error class with regard to critical errors is linked directly to the terminal device of the waste gate, since such a serious error necessarily marks the printed product produced as waste and thus makes it necessary to eject it via the waste gate.
  • Another inventive solution to the problem posed is a method for waste management in a machine that processes printing materials by means of a Computer, whereby sensors, in particular in the form of an image acquisition system with at least one image sensor, acquire print images from the printed print products and compare them with a digital reference and, in the event of discrepancies between the captured print images and the digital reference, the incorrectly recognized print products are ejected, and which is characterized in that, as part of the image inspection, an inspection area is defined on a print substrate used to inspect the printed product to be inspected, while an additional warning level monitors the part of the print substrate for undesired changes that lies outside the defined inspection area, with deviations within the additional advance warning level can be assigned to an additional error class for advance warning.
  • the additional advance warning level does not correspond to a further inspection level within the standard inspection process, but is a parallel process which defines an area of surveillance without a deviation report in the sense of the normal image inspection of the image inspection system. Separate parameters are used for this area in order to define an advance warning threshold, which, if exceeded, provides the printer with a corresponding early warning display in the user interface.
  • the actual image inspection is carried out within the defined inspection areas, while in the advance warning level only the separate parameters are monitored and no possible detected deviations are displayed as errors.
  • the generated images are also not stored in an inspection report, as is the case for the image inspection in the defined inspection areas.
  • the pre-warning level is therefore a purely additional informative aspect, which informs the printer about developments outside the inspection area on the print substrate in order to avoid the previously known procedures of switching to a live image, which interrupts the automatic image inspection, as well as the manual checking of the Print substrate avoids.
  • the undesired changes include smearing of the printing ink at the edges of the printing substrate, an inking unit that is idling, errors in the printing substrate flow and errors in the Print substrate itself.
  • the separate parameters for the warning level must be adapted accordingly to the undesired changes in the form of the smearing of the printing ink on the edges of the idle inking unit and the errors in the print substrate or in the print substrate run.
  • a preferred development of this method according to the invention is that the monitoring of the additional advance warning level with regard to undesired changes on the part of the print substrate that lies outside the defined inspection area is carried out by a separate software instance operated on the computer, which is carried out by the Software instance, which performs the inspection of the print image to be inspected, is separated. Since the monitoring of the warning level should not be included in the process of image inspection of the inspection areas, it makes sense to carry out this process on the same computer for the image inspection, but to have it carried out by a separate, separately operated software instance.
  • the program that performs the normal image inspection can also take on this task, but since the pre-warning level is monitored with its own set of parameters and is also treated completely differently with regard to the further evaluation of the inspection results than the normal image inspection, these are separated both monitoring operations in separate programs are much more efficient.
  • a preferred development of this method according to the invention is that the monitoring of the additional advance warning level with regard to undesired changes on the part of the print substrate that lies outside the defined inspection area is carried out by the at least one image sensor or by at least one separate image sensor.
  • the method according to the invention of monitoring the additional advance warning level makes use of the hardware already used for the normal image inspection method in the form of the installed camera system of the inspection system. If for any reason these image sensors cannot be used, for example because the image sensors do not monitor certain edges or edge areas of the print substrate, a separate image sensor or several separate image sensors can also be used.
  • the additional error class for the advance warning corresponds to an error class which, as an action, results in the display of the advance warning in the user interface of the inspection by controlling the terminal of the display.
  • the monitoring of the additional pre-warning level results in a deviation from the corresponding set separate parameters in the classification of this deviation in an additional error class "pre-warning", which is directly linked to the action of displaying the pre-warning in the form of controlling the terminal device of the display, for example at the control station of the printing press.
  • the printing press is a sheet-fed printing press and the printing substrate used is a printing sheet.
  • the method according to the invention can be used on all conceivable types of printing machines, such as web offset printing machines or digital / inkjet printing machines in general, use in a sheet-fed printing machine, in which the printing substrate used is a printed sheet, is preferred.
  • the waste gate as a terminal device can be implemented much more easily on a sheet-fed printing press than, for example, on a web-fed printing press.
  • waste profiles contain application classes which the computer assigns to a print job either in prepress or directly on the machine processing printing materials.
  • application classes which depend on the application goal of the respective print job, time-consuming setting work can be reduced or even avoided by reusing a profile that has been created once.
  • the method according to the invention is implemented as part of camera evaluation software in a printing press 5, preferably in a sheet-fed printing press 5 and, in a further preferred embodiment, in the same structure also in a web printing press 5.
  • the image acquisition system 1 required for this has a camera system 6 consisting of one or more cameras arranged next to one another, such as line, array and / or scanner cameras, which read in the sheet / label with high resolution after printing.
  • the schematic structure is in Figure 1 shown.
  • the cameras are synchronized with the print line cycle - or with a cycle that is removed from the web (rotary encoder, impeller, ...) - so that the images are recorded without distortion - this also applies to pretensioned paper webs on a roll printing machine 5
  • the cameras are connected to a fast data evaluation computer 7 on which the method is carried out. It is also possible to carry out the method on the control computer 2 of the printing press 5, but the execution via the data evaluation computer or image processing computer 7 is preferred.
  • the results are then passed on via a network interface to the machine control and a display for the printer 4 (for example on the wallscreen / display 3 of the printing machine 5).
  • This image acquisition system 1 is integrated in a printing machine 5, as in FIG Figure 2 is pictured.
  • the camera system 6 is preferably in the last printing unit Printing machine 5 integrated.
  • the printing errors found by the image acquisition system 1 can then be displayed to the printer 4 via a display 3.
  • Figure 7 shows the sequence of the method according to the invention in its preferred variant.
  • the data of the print job 17 are evaluated in the prepress computer and from this the data 18 for controlling the printing machine 5 for printing the print image to be generated are created, from which the inspection areas 15 in the print image to be generated are defined in the context of image acquisition / inspection to let.
  • individual inspection areas 15 are defined in which the inspection is to be active. This is very good in Figure 3 and Figure 4 to recognize.
  • Figure 3 shows an example of a print image to be generated on a sheet 10, this being divided into the benefits 11 and the unprinted areas 12.
  • print control strips 22 can be seen which are located in the area that has not been inspected.
  • the inspection areas 15 for the panels 11 are then defined on this print image, which are shown in FIG Figure 4 are shown.
  • the pre-warning level 13 can then be defined and parameterized in a next step. Outside the defined inspection areas 15, the remaining sheet 10 is defined as the “advance warning level” 13.
  • the printer can define parameters (for example the size of the deviation, contrast of the deviation, frequency of repetition) and when the camera system 6 is to provide an advance warning. No deviations are displayed as errors for this level. Rather, an early warning display is displayed in the user interface, which indicates to the printer 4 that, within the framework of the image acquisition / inspection and its set parameters, deviations from the reference taught in or created from the prepress data 17 were found here. The printer 4 can then analyze the cause and take measures before the undesired properties reach the print product 11 to be produced.
  • the next step in the method according to the invention is to parameterize the data of the actual production inspection 19 for the inspection areas 15. This can also take place before the pre-warning level 13 is defined and parameterized.
  • waste profiles are then created for the treatment of printing errors discovered during the inspection or the pre-warning monitoring.
  • these waste profiles are implemented in the form of defect classes 20, 21.
  • the printer 4 can define the parameters for the error classes 20, 21 in a menu of the production inspection. When operating the machine control, the printer 4 can then link these error classes with the desired terminals 3, 8, 9, with the result that the handling of detected and classified errors is automated.
  • he 4 can ensure that a precise inspection with low threshold values is possible without the sheets being ejected and destroyed immediately by the waste gate 9.
  • he 4 has the option of separating information and waste management. Without this implementation, he would 4 have to choose one of the paths and thus lose flexibility or information.
  • the printer 4 is relieved of the fact that it no longer has to constantly interrupt the inspection mode in order to check errors 14, 16 that occur outside the inspection areas 15 of the utility 11.
  • waste profiles can, however, contain much more required information than just pure error classes, which mainly define what is to be recognized as waste and what is to be done with the recognized waste.
  • the waste profiles therefore correspond quite generally to templates which contain corresponding input parameters and describe actions that are defined for these parameters and which the machine is to carry out.
  • Various profiles can be defined as templates and processed automatically by the machine. The profiles can be created in different ways. User 4 can define parts of this, for example. Machine settings 18 can then already be derived from this. These machine settings 18 can then by further input parameters, such as. B. individual experience of the Print shop, to be supplemented. Furthermore, adjustments can also be made by the operating personnel 4 of the printing press 5.
  • Such individual input parameters could, for example, be the number of setup sheets which, depending on the user and the required quality, define from when a good sheet production should automatically start and which printed sheets 10 are automatically ejected.
  • the profiles are assigned to a print job either in prepress or directly on the printing press 5.
  • a wide variety of categories are possible for the print jobs, e.g. pharmaceuticals, packaging, labels, security, etc.
  • the printing press 5 then derives the specific settings for the determination of waste and the handling of it, taking into account its equipment, and parameterizes the printing press 5 and associated peripheral devices for waste detection, ejection, marking and documentation.
  • Application classes can also be mapped with the waste profiles. Such reuse of a waste profile that has been created once reduces or even avoids time-consuming adjustment work.
  • the aim is an automated machine reaction on the basis of predefined action profiles in connection with measurement data, which are determined by sensors during print production and compared with the action profiles.
  • the waste profiles can also contain instructions for the operating personnel 4 and further settings. These can include, for example, information on activities and settings that cannot be automatically determined from the order data or that cannot be set automatically.
  • An example of a waste profile in the method according to the invention looks as follows: Application class packaging 1 Operator instructions Instruction 1 Text 1 Sample sheet every 500 sheets 500 ... Settings: Powder's places Xyz Humidity setting ... Inking unit settings ... Coating unit settings ... Anilox roller ... ... Waste management: Startup waste Makuschleuse Process waste Makuschleuse ISC A Strip insert counting 1000 Drawing errors Makuschleuse Code star A Start number: 00001 ... Colorimeter: Color control A ... Inspection: Level 2 Error class 1 stack Error class 2 Makuschleuse Error class 3 Makuschleuse Profile enriched by job-specific data Coordination with the customer 03/10/2018 2:30 p.m.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Image Processing (AREA)

Claims (10)

  1. Procédé de gestion des macules dans une machine (5) de traitement de supports d'impression au moyen d'un ordinateur (2, 7) pour lequel, dans le cadre de la gestion des macules, des capteurs, notamment sous forme d'un système de détection d'images (1) avec au moins un capteur d'images (6), détectent des images d'impression (11) des produits imprimés et les comparent à une référence numérique et, en cas d'écarts des images d'impression détectées par rapport à la référence numérique, les produits d'impression incorrectement détectés sont éjectés, des profils de macules étant générés, renfermant des paramètres auxquels sont respectivement associées des actions spécifiques et, pour les images d'impression (11) qui s'écartent de la référence numérique et sont détectées au cours de l'inspection de l'image, les actions spécifiques sont effectuées en fonction des paramètres, différents terminaux (3, 8, 9) étant respectivement pilotés en fonction des actions spécifiques,
    caractérisé en ce
    que, dans le cadre de la gestion des macules, une surface d'inspection (15) est définie sur un support d'impression utilisé pour l'inspection du produit imprimé à inspecter, tandis qu'un niveau d'avertissement supplémentaire (13) surveille la partie du support d'impression qui se trouve en dehors de la surface d'inspection définie (15) pour détecter des modifications indésirables, les écarts à l'intérieur du niveau d'avertissement supplémentaire (13) étant attribués à une catégorie d'erreurs supplémentaire (21) pour avertissement.
  2. Procédé selon la revendication 1,
    caractérisé en ce
    que les profils de macules contiennent des catégories d'erreurs définies (20, 21) comme paramètres et que les actions spécifiques sont attribuées à ces catégories d'erreurs, les catégorie d'erreurs définies (20) étant subdivisées en catégories d'erreurs pour l'information sur les écarts qui sont encore dans les tolérances, pour l'avertissement sur les défauts qui se produisent et sur les défauts critiques nécessitant des actions directes.
  3. Procédé selon la revendication 2,
    caractérisé en ce
    que la classification dans la catégorie d'erreurs pour l'information sur les écarts encore dans les tolérances provoque comme action l'affichage de l'information dans l'interface utilisateur de l'inspection, que la classification dans la catégorie d'erreurs pour l'avertissement concernant les erreurs se produisant provoque le marquage des produits imprimés défectueux et que la classification dans la catégorie d'erreurs relative aux défauts critiques provoque l'éjection des produits imprimés défectueux.
  4. Procédé selon la revendication 3,
    caractérisé en ce
    que l'affichage des informations dans l'interface utilisateur de l'inspection est effectué par le pilotage du terminal d'un écran (3) sur lequel les résultats de l'inspection de l'image sont affichés, que le marquage des produits imprimés défectueux est effectué par le pilotage du terminal d'un pavillonneur (8) et que l'éjection des produits imprimés défectueux est effectuée par le pilotage du terminal d'un déflecteur de macules (9).
  5. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que les modifications indésirables (14, 16) incluent un maculage de l'encre d'impression sur les bords du support d'impression (14), un dispositif d'encrage fonctionnant à vide (16), des défauts dans l'acheminement du support d'impression et des défauts dans le support d'impression proprement dit.
  6. Procédé selon la revendication 5,
    caractérisé en ce
    que la surveillance du niveau d'avertissement supplémentaire (13) concernant des modifications indésirables (14, 16) sur la partie du support d'impression se trouvant en dehors de la surface d'inspection définie (15) est assurée par une instance de logiciel distincte utilisée sur l'ordinateur (2, 7), cette instance de logiciel étant distincte de l'instance de logiciel qui effectue l'inspection de l'image imprimée (11) à inspecter.
  7. Procédé selon l'une des revendications 5 à 6,
    caractérisé en ce
    que la surveillance du niveau d'avertissement supplémentaire (13) concernant des modifications indésirables (14, 16) sur la partie du support d'impression se trouvant en dehors de la surface d'inspection définie (15) est assurée par le capteur d'image (6) au moins ou par un capteur d'image distinct au moins.
  8. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que la catégorie d'erreurs supplémentaire (21) pour l'avertissement correspond à une catégorie d'erreurs entraînant comme action l'affichage de l'avertissement dans l'interface utilisateur de l'inspection par le pilotage du terminal de l'affichage.
  9. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que la machine de traitement des supports d'impression (5) est une machine à imprimer à feuilles (5) et que le support d'impression utilisé est constitué de feuilles à imprimer (10).
  10. Procédé selon l'une des revendications précédentes,
    caractérisé en ce
    que les profils de macules contiennent des catégories d'application que l'ordinateur (2, 7) attribue à un travail d'impression, soit au stade du prépresse, soit directement à la machine (5) de traitement de supports d'impression.
EP18181139.9A 2017-09-14 2018-07-02 Inspection d'image des produits imprimés avec des classes d'erreur Active EP3456535B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017216260.0A DE102017216260A1 (de) 2017-09-14 2017-09-14 Bildinspektion von Druckerzeugnissen mit Fehlerklassen

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EP3456535A1 EP3456535A1 (fr) 2019-03-20
EP3456535B1 true EP3456535B1 (fr) 2021-04-21

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EP3808564B1 (fr) * 2019-10-16 2023-12-20 Heidelberger Druckmaschinen Intellectual Property AG & Co. KG Numérotation autonome de feuilles
EP3865304B1 (fr) 2020-02-13 2022-01-05 Heidelberger Druckmaschinen AG Vérification d'image déterministe
EP3878653A1 (fr) 2020-03-11 2021-09-15 Heidelberger Druckmaschinen AG Inspection comprenant une classification d'erreurs
DE102021104963A1 (de) * 2020-03-20 2021-09-23 Heidelberger Druckmaschinen Aktiengesellschaft Makulaturprädiktion
CN112767306A (zh) * 2020-12-24 2021-05-07 凌云光技术股份有限公司 一种印刷品质量检测、收料方法和***
CN116572636B (zh) * 2023-04-26 2024-01-16 湖南隆深氢能科技有限公司 一种双辊热转印设备的检测方法及***

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